西安科技大学学报2012，Vol.32Issue(1)：86-90,5.
R417A与R22流动沸腾换热性能的比较分析
Comparison and analysis of flow boiling heat transfer performance for R417A and R22
摘要
Abstract
The experimental study was carried out on heat transfer of R417A and R22 flow boiling inside horizontal smooth and two internally grooved tubes with different geometrical parameters, the difference of heat transfer performance for R417A and R22 was analyzed and compared. The results indicate: Compared to R22, the heat transfer performance for R417A decreases, and this decrease associates with mass flux, vapor quality and geometrical parameters of test tube, the lower mass flux, the more serious decrease of heat transfer performance for R417A; At lower vapor quality region for x <0. 6, the heat transfer coefficients for R417A in smooth tube decrease 20% ~40% than R22, and this decrease is more serious in internally grooved tubes, almost reaches 50% ~ 60% , at higher vapor quality region for χ >0. 6, the decrease of heat transfer coefficients for R417A in different tubes is close to each other. The influence of vapor quality on decrease of heat transfer coefficients for R417A is bigger in smooth tube and is smaller in internally grooved tubes, the decrease augments with the increasing vapor quality in smooth tube; The better effect of heat transfer enhancement by internally grooved tubes, the bigger decrease of heat transfer coefficients for R417A.关键词
R417A/R22/流动沸腾/换热性能Key words
R417A/ R22/ flow boiling/ heat transfer performance分类
能源科技引用本文复制引用
张小艳,张进,赵登育..R417A与R22流动沸腾换热性能的比较分析[J].西安科技大学学报,2012,32(1):86-90,5.基金项目
陕西省教育厅专项科研计划项目(09JK600) （09JK600）
